Taian heating company group, hot water main transfer pipe leaking, impact damage, the leaking point is near to the wall, too small room to replace a new pipe to connect. steel pipe. if use the traditional way, we have to cut off the leaking part and replace an exactly same pipe and welding for connecting. We gave our option using one ss304 band repair clamp with the ductile iron fastener. only use one wrench to fix the pipe leaking under-pressure, without welding, safe operation.